<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    
</head>
<body>
  <el id="app">
    {{msg1}}
    <div>
      {{msg2}}
    </div>
    <input v-model="msg1"/>
  </el>
</body>
<script src="./js/Watcher.js"></script>
<script src="./js/Dep.js"></script>
<script src="./js/Compiler.js"></script>
<script src="./js/Observer.js"></script>
<script src="./js/Vue.js"></script>
<script>
  var el = document.querySelector("#app")
  const vm = new Vue({
    el : el,
    data : {
      msg1: '内容1',
      msg2: '内容2',
      obj: {
        name: '123'
      }
    }
  })
</script>
</html>